/*
 * Copyright 2017 Realm Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package io.realm;

/**
 * The default implementation for determining if a file should be compacted or not. This implementation will only
 * trigger if the file is above 50 MB and more than 50% can be reclaimed.
 */
public class DefaultCompactOnLaunchCallback implements CompactOnLaunchCallback {
    @Override
    public boolean shouldCompact(long totalBytes, long usedBytes) {
        final long thresholdSize = 50 * 1024 * 1024;
        return (totalBytes > thresholdSize) && (((double) usedBytes / (double) totalBytes) < 0.5);
    }
}
